Sass: Listen has fallen back to polling
Default install of Debian 7 only has ruby 1.8.7 which is not supported by new versions of listen. A Github ticket implies that listen 1.3.1 is last supported version for pre 1.9 version of ruby.
$ ruby --versionruby 1.8.7 (2012-02-08 patchlevel 358) [x86_64-linux]$ sudo gem install --version '1.3.1' listengem should pull rb-inotify as a dependency of listen.